Carpet dust cleaner



June 24, 1930. o. ALDINGER 1,765,784

' y CARPET DUST CLEANER Filed Jan. 15. 192e .E- IN E3 'i ,35 tion andforming Pari"v thereof ia Carpet dust tric motor, a, fan and a filtermounted in said Patented v.lu-ne 24,1930 i i 1,765,784

UNITED I STATESv PATENT OFFICE OTTO ALDINGER, F STUTTGART, GERIIIIANYCARPET DUST CLEANER Application illed January 15, 1926, Serial No.81,530, and in Germany September 2, 1924.

My invention relates to carpet dust cleanbracket o, and 1' is a threadedboss at the end ers, more especially of the type in which a of an armsecured to or integral with the motor driven fan enclosed in a casingexerts bracket g. A threaded rod c is secured in suction on the air.from which the dust is to the boss r at one end. Its other end is also5 be extracted. v threaded and extends through the cover z' 55 It is an,object of my invention to protect where it is held by an insulating nutm. 4the person operating the dust cleaner against c is a filter orscreen which is secured to electric shocks which may arise when comanannular projection s at one end and a ing in Contact with the metalcasing, and to Washer t at the other end, this washer being reduce to aminimum the noise connected held on the rod by a nut u. A- frame c 60with the operationof the apparatus. is guided on the rod at its centreandadapted When a dust cleaner having a metal casto be displaced by anut lurso as to impart ing is opened for inspectionthe casingv maytension to the screen c. accidentally be in contact with a pole of `theThe cover g at the opposite end of the electric system so that theperson handling casing is hemispherical and perforated at c5 itmaypreceive a shock which is particularly` f, f. A cap e with l acentral opening d is dangerous if the cleaner is operated at acominserted in the cover g. paratively high voltage, say 200volts. Airis drawn into the casing through a Another drawback of the metal casingis pipe a2 in the cover i and discharged through its sound reinforcingcapacity, the casing the opening d in the cap and the perforationsacting as a resonator forthe noise resulting f in the cover g. A g fromthe operation of the fan and the motor. It will be understood that theconstruc n These drawbacks are overcome according tion of the mechanicalparts in the casing has to my invention by providing a casing of nobearing on the invention, the only feature suitable non-metallic andsound-deadening to be protected beingthe casing made of material. Amaterial which has been found a non-conductive, sound deadeningmaterial. to be particularly suitable is cork composi- I Wish it to beunderstood 'that I do not tion. A Carpet dust Cleaner equipped Withdesire to be limited to the exact details of .a casing of this materialnot only affords costruction shown and described, for obvious completeprotection against short-circuiting modifications will occur to-a personskilled in 9 and'shocks but also reduces the noise lto practhe art.tically nil as 'compared with a device of equal I c1aim; sizebut'eqllipp-ed With a metal CaSlIlg. Carpet dust cleaner comprising acasing In the dIaWlIlgS 'flXed t0 thlS SPeClC- orenvelope of corkcomposition and an elec#l cleaner embodying my invention is illustratedcasing or enve10pe diagrammaticauy by Way 0f example- In testimonywhereof I affix my signature.

Referring to the drawings h is a cylin- OTTO ALDINGER. drical casing ofelectrically. insulating and 40 sound deadening material' and g and z'are 90 covers at both ends thereof and consisting of insulating materialas well.` Cork composition has been found to be' very. suitable. a is ashaft which is rotatably carried in suitable bearings of a flangedbracket o which may be 96 secured to an annular projection p on theinside of the cylinder h. The armature of a motor a and a fan-b arekeyed on the shaft n. Another anged bracket q is clamped between'theprojection p and the ang'e of the 10,

